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UPLOADS


Media Type
256
texts
Topics & Subjects
255
nasa
252
guidance
251
apollo
245
software
134
luminary
15
simulation
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Collection
Creator
31
don eyles
27
mit instrumentation laboratory
23
george w. cherry
22
d. densmore
20
craig schulenberg
12
dana densmore
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English
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Creator
Virtual AGC Project
Dec 20, 2017 MIT Instrumentation Laboratory
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Apollo-era digital simulation of Colossus 237, anomaly #45 (bailout during burn).
Topics: nasa, apollo, guidance, simulation
Virtual AGC Project
Oct 17, 2017 GEMINI Systems Engineering Staff
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eye 24
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Report on preliminary studies on the simulation of GEMINI ascent guidance.
Topics: nasa, gemini, guidance, simulation
Virtual AGC Project
Apr 28, 2017 NASA
texts
eye 58
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Map of KSC from March 1972.
Topic: nasa
Virtual AGC Project
Apr 27, 2017 NASA
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eye 34
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A map of Kennedy Space Center, from January 1981.
Topic: nasa
Virtual AGC Project
Apr 23, 2017 Don Eyles
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eye 11
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Replacement for the erasable-memory program given in LUMINARY Memo 235 (rev 1), which was intended to allow an auto-pilot controlled lunar landing  in spite of failed CDUX.   Regarding the numbering of this memo, it identifies itself as LUMINARY Memo #339, but that is certainly not a correct number.  On the basis of the dating, and the LUMINARY Memos not known to have survived, it could be #237-238, 241-243, or 245-246, with #241-243 being the most likely in terms of the dating, though #238...
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Don Eyles
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Provides an erasable memory program could divide the landing radar altitude measurement by 5 (in between the measurement and the use to update the LM state vector).  This is in response to the potential "failure of one of two suspect transistors in the landing radar unit to be flown on Apollo 17", which would cause this measurement to be too big by a factor of 5.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Luminary Test Group
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eye 16
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Summary of software-test results for Apollo 17.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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eye 13
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A preliminary software-test plan for Apollo 17.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Don Eyles
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Describes an erasable-memory program used in conjunction with P47, which could be used to monitor the ascent burn in case targeting with P12 was impossible and it was "urgently necessary to get off the moon".
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Luminary Test Group
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eye 17
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Summarizes Apollo 16 software testing.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Don Eyles
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Discusses an erasable-memory program for displaying landing radar altitude and altitude-rate on the DSKY, as a backup for the tape meters.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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eye 12
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This is a continuation of LUMINARY Memo #230, extending the discussion to landing sites not at the equator.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Don Eyles
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Describes an erasable-memory program which theoretically would allow a landing under autopilot control in spite of a failed CDUX.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 B. McCoy and D. Millard
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(This is also COLOSSUS Memo #327.)  This is a follow-up on LUMINARY Memo #233, principally concerned with clarifying software-control procedures for erasable-memory programs.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Margaret Hamilton
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(This is also COLOSSUS Memo #326.)  This is a redistribution of two other memos, "Erasable Memory Program (EMP) Control Procedures" by K. W. Greene and "EMPs" by Margaret Hamilton, describing the contents and formats of erasable memory programs.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Don Eyles
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Investigates whether it is possible (in Apollo 16) to compensate for low thrust during a lunar landing by redesignating the landing site using noun 69.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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eye 22
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A preliminary software-test plan for Apollo 16.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 L. Berman
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Discusses the effect on LM ascent of inaccurate time-synchronization between the LM and CSM, due to the such synchronization being performed only occasionally.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 David Moor, Craig Work, Peter Weissman
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Describes some tests on burn performance under certain conditions, performed in response to some inquiries from MSC.
Topics: nasa, apollo, guidance, software, simulation
Virtual AGC Project
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Describes a one-word mod and a procedural change allowing P99, the LM-deorbit erasable-memory program, to be used in Earth orbit. 
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Summarizes results from testing the DSKY keystroke-backup erasable-memory program given in LUMINARY Memo #224, assuming failure of the DSKY ENTER key.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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eye 10
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Discusses the behavior of the AGC-to-AGS rendezvous-radar data transferral in case of various types of failures.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 C. W. Schulenberg and P. Rye
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eye 9
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Supercedes the code (though not the descriptive material) provided in LUMINARY Memos #216 and #219.
Topics: nasa, apollo, guidance, software
Corrects two errors in the code provided in LUMINARY Memo #220.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Luminary Test Group
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Reports on software-test results for LUMINARY 1E.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Craig Work
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Reports on testing of Apollo 15 digital autopilot performance.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Discusses an erasable memory program developed to provide a workaround in case of any one of the DSKY keys (other than PROCEED/STANDBY) failing in a stuck-open state.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 C. Schulenberg
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Describes descent-abort procedures alternate to the one from LUMINARY Memo #216, because the favorable testing associate with Memo #216 was actually based on incomplete information and thus inaccurate assumptions.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 David Moore
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Reports on testing of Apollo 15 LM-deorbit erasable memory program P66.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 R. A. Larson
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eye 9
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Update of Apollo 14 (Luminary 1D) program notes for Luminary 1E (Apollo 15-17).
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 C. Schulenberg and P. Weissman
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eye 14
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Discusses the problems created by the incorporation in LUMINARY 1E of code intended to avoid the problem (experienced in Apollo 14) of incorrect abort system discretes.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Describes the time limitations in Apollo ephemeris data.  Although the ephemeris data was regarded as valid for a 1-year interval, the memo concludes that it is really valid for 2-2.5 years.  There is an amusing misprint that (as a result) the Apollo 15-17 launches must occur before 17 February 1964 (should be 1974).
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Luminary Test Group
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Detailed description of some digital simulation tests for LUMINARY 1E.
Topics: nasa, apollo, guidance, software, simulation
Virtual AGC Project
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This is a continuation of LUMINARY Memo #203.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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eye 12
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Report on simulation of delayed tip-over of the LM during descent, which could happen because of the addition of an abort-override in LUMINARY.
Topics: nasa, apollo, guidance, software, simulation
Virtual AGC Project
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Describes rewrite of Apollo 14 P66 program for the Apollo 15 LM deorbit.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Peter Volante and W. Ostanek
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eye 15
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(This is also COLOSSUS Memo #312.)  In Apollo 14, the double-precision value TEPHEM had a sign-mismatch between the more-significant and the less-significant words.  This memo reports on testing that showed the sign mismatch had no effect.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Updates LUMINARY Memo 178 (LUMINARY 1D for Apollo 14) to account for changes in LUMINARY 1E (for Apollo 15-17).
Topics: nasa, apollo, guidance, software
Describes effect of terrain model errors in Apollo 14 programs P64 and P66 for the lunar landing.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Describes tests of responsiveness to DSKY input during engine-fail conditions.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Peter Weissman
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eye 14
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Describes certain tests of the attitude error.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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Describes software changes in LUMINARY 206 through 209.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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Describes software changes in LUMINARY 205.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 C. Work and P. Weissman
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Describes testing of the capability in LUMINARY 1E for the AGC to continue to attempt to control attitude and steering even if the AGC is supposedly in control.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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Describes software changes in LUMINARY 204.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
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Analysis of the interaction between AGC down-telemetry software, the hardware interrupt system, and the downlink telemetry hardware, especially with respect to abnormal sequencing.  There's also some good background material on how it works in general.  This is also COLOSSUS Memo #310.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 V. Dunbar and Peter Volante
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eye 12
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Describes the implementation of the new method for automated transferral of rendezvous radar data from the Apollo guidance computer (AGC) to the abort guidance system (AGS).
Topics: nasa, apollo, guidance, computer
Virtual AGC Project
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eye 11
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Describes changes to P99 program from Luminary 1D for use in Luminary 1E.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Craig Work and Peter Weissman
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eye 12
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Report on digital autopilot tests in Apollo 14 testing.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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eye 12
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Description of software changes for LUMINARY 203.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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Description of software changes in LUMINARY 201 and 202.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 D. Densmore
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Describes the software changes for LUMINARY 200.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 23, 2017 Allan Klumpp
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Analysis of the yaw divergence at the end of P64, the approach phase program.  The memo provides a lot of background information as well.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Description of the software changes in LUMINARY 197 through 199.  The memo is incorrectly dated 8 January 1970, whereas it was really 1971.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Description of the software changes for LUMINARY 196.  The memo dates itself (incorrectly) as January 5, 1970, whereas in fact it was from 1971.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
texts
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Provides a list of hardware-related constants appearing in the LUMINARY 178 (Apollo 14).  (It seems that the word "fixed" in the title does not relate to fixing constants that were in error, but rather, redundantly, that the constants were fixed in the sense of being unchanging.)
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Description of software changes for LUMINARY 195
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes the software changes for LUMINARY 194.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes the software changes for LUMINARY 193
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes the software changes for LUMINARY 192.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 David Moore
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Test plan and results of performance tests for APS Impulsive Burn for APOLLO 14 during rendezvous.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes the software changes in LUMINARY 191.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes the software changes in LUMINARY 188 through 190.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 10
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Describes software changes in LUMINARY 187.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 11
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Describes software changes in LUMINARY 186.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Millard
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Describes new sighting mark procedures and mark channel bit protection in LUMINARY 202, particularly in reference to imminent use in simulators.
Topics: nasa, apollo, guidance, software, simulation
Virtual AGC Project
Apr 22, 2017 David Moore
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Reports on results of tests of the Apollo 14 LM's P99 program.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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Describes software changes to LUMINARY 184 and 185.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 Peter S. Weissman
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Guide for crew and "other autopilot users" as to when various LM autopilot inputs are changed.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 Don Eyles
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Describes the software changes from ZERLINA 50 to ZERLINA 56.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 10
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Describes the software changes in LUMINARY 183.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 10
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Describes the software changes in LUMINARY 182.
Topics: nasa, apollo, guidance, software
Summarizes PCRs (both approved and disapproved or withdrawn) relating to coordinate systems, ephemerides and orientation subroutines, and so on.  Both COLOSSUS and SKYLARK are covered, so this is also a COLOSSUS Memo (#293) and a SKYLAB Memo (unnumbered).
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 11
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Describes the software changes in LUMINARY 181.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 D. Densmore
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eye 12
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Describes the changes to LUMINARY 179 and 180.  179 was actually a no-change — i.e., merely a bump to the revision number — because it was the changeover point from LUMINARY 1D (Apollo 14) to LUMINARY 1E (Apollo 15-17).
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 Don Eyles
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eye 12
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Describes some changes between ZERLINA 21 and ZERLINA 50.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Apr 22, 2017 H. McOuat
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eye 11
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Computes the lunar positioning error due to the mis-scaling (by a factor of 2)  of a particular value in Luminary 1D (Apollo 14), and indicates that no fix was actually planned for Apollo 14.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Apr 22, 2017 B. McCoy
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eye 11
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Describes some software testing that will be performed for the Apollo 14 LM software.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 Robert Covelli
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eye 11
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Provides a program for the LM AGC's erasable memory, which could be used to provide a cleaner, more accurate crashdown of the LM ascent stage onto the lunar surface after rendezvous relative to the crashdowns used for Apollo 12 and intended to be be used for Apollo 13.  Part of what's interesting about the memo is that it includes a mini-howto on how to actually write programs for the erasable memory.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 B. McCoy and P. Rye
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eye 9
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Describes changes to Luminary 178 vs prior two releases of Luminary 1D software.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Apr 22, 2017 B. McCoy and P. Rye
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eye 14
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Describes changes in Luminary 178 vs the prior 2 releases of Luminary 1D.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
texts
eye 9
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Describes a computational error in total delta-V, related to using just the more-significant word of a double-precision constant.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 Craig Schulenberg
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eye 17
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Lists LMAGC software changes between LUMINARY revisions 27 and 34.
Topics: nasa, apollo, guidance, software
Report on a meeting between MSC and the Instrumentation Laboratory pertaining to one-phase vs two-phase targeting for the lunar landings.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Apr 22, 2017 George W. Cherry
texts
eye 9
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Describes a potential alternative algorithm for velocity nulling,  on a variable schedule rather than at fixed time increments, for the last 10 seconds of program P64 and the entirety of P65.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Mar 31, 2017 NASA MSC, Mission Planning and Analysis Division
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eye 65
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This is a pseudo-code description of the Artemis 72 AGC Command Module software used in Apollo 15-17.  It is intended, as the document itself says in its Abstract, "that it be used together with a symbolic tabulation of the program".
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Mar 26, 2017 MIT Instrumentation Laboratory
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eye 13
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These are the notes from the AGC Software Control Board meeting held between the MIT IL and MSC on October 9, 1969
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 26, 2017 MIT Instrumentation Laboratory
texts
eye 17
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These are the notes from the AGC Software Control Board meeting, #37, held between the MIT IL and MSC on April 9, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 26, 2017 MIT Instrumentation Laboratory
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eye 13
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These are the notes from the AGC Software Control Board meeting, #35, held between the MIT IL and MSC on February 4, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 25, 2017 MIT Instrumentation Laboratory
texts
eye 16
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These are the notes from the AGC Software Control Board meeting, #34, held between the MIT IL and MSC on December 18, 1969.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 25, 2017 MIT Instrumentation Laboratory
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eye 14
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These are the notes from the AGC Software Control Board meeting, #33, held between the MIT IL and MSC on November 13, 1969.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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These are the notes from the AGC Software Control Board meeting, #43, held between the MIT IL and MSC on January 13, 1971.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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eye 14
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These are the notes from the AGC Software Control Board meeting, #42, held between the MIT IL and MSC on November 5, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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eye 14
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These are the notes from the AGC Software Control Board meeting, #41, held between the MIT IL and MSC on September 30, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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This is a partial set of notes from the AGC Software Control Board meeting, #40, held between the MIT IL and MSC on August 14, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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This is a partial set of notes from the AGC Software Control Board meeting, #39, held between the MIT IL and MSC on July 10, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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eye 19
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These are the notes from the AGC Software Control Board meeting, #38, held between the MIT IL and MSC on May 17, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 24, 2017 MIT Instrumentation Laboratory
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eye 17
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This is a partial set of notes from the AGC Software Control Board meeting, #36, held between the MIT IL and MSC on March 6, 1970.
Topics: apollo, nasa, guidance, software
Virtual AGC Project
Mar 19, 2017 MIT Instrumentation Laboratory
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Section 4 of Lunar Module GSOP for Apollo 15-17.
Topics: nasa, apollo, guidance, software
Virtual AGC Project
Mar 19, 2017 MIT Instrumentation Laboratory
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Section 5 of Lunar Module GSOP for Apollo 15-17.
Topics: nasa, apollo, guidance, software